Electrical heat-motor.



No. 764,518. I PATENTBD. JULY 5, 1904. 1 H. BREMER.

I ELECTRICAL HEAT MOTOR.

nrmonmn' FILED we. 15, 1903. nmmwnn my 1, 1904. no menu. 1

Wan: ZIZPPII/OIS UNITED STATES Patented July 5, 1904.

HUGO BREMER, OF NEHEIM, GERMANY.

ELECTRICAL HEAT-MOTOR- SPEGIFICATION forming part of Letters Patent No..'764,518, dated July 5, 1904.

Application filed August 15, 1903. Renewed May 7 1904. Serial No. 206,941. (No model.)

To all whom it may concern.-

Be it known that I, Hueo BREMER, civil engineer and manufacturer, a subject of the King of Prussia, German Emperor, and a resident of N eheim-on-the-Ruhr, in the Kingdom of Prussia, German Empire, have invented a new and Improved Electrical Heat-Motor, of which the following is a specification.

This invention relates to an electrical heatmotor in which a magnetizable armature adapted to move in a magnetic field is set in rotary motion by being partially heated- 21. a, only on one side-the heating being effected by an electric current which, if desired, may at the same time be employed for producing the magnetic field. Instead of heating directly the magnetizable armature I may heat the latter indirectly by heating the electromagnet which excites the field and transmitting the heat from said magnet to the armature. In this case the pole or pole-shoe of the magnet may be provided With an extensionpiece adapted to transmit the heat, butconsisting of a non-magnetizable material. The cooling of the heated part of the armature when it is about to leave or has left the magnetic field may be accelerated by suitable meansfor instance, such that allow of making use of the thermo-electric currents generated by the changes of temperature.

In order to make my invention more clear, I refer to the accompanying drawings, in which similar letters denote similar parts throughout both views, and in which- Figure 1 is a diagrammatical plan of an electrical heat-motor constructed according to my invention, and Fig. 2 is a diagrammatical side view of the same.

In the form of construction shown the armature consists of a flat ring a, secured to the shaft 6, the object of this shape of armature being to obtain a continuous and uniform rotation. The magnetic field by which the armature or ring a is rotated in the direction of the arrow, Fig. 2. is produced by an electro magnet 0, having in the example shown besides the exciting-coil (Z a high-resistance coil (Z, by means of which the active end 0 of the magnet is heated. The two coils may be supplied with current from a common source. The 1 active end of the magnet is furnished with an extension-piece a, consisting of another material than the magnetvf. 0., such which although transmitting the heat to the armature does not attract the latter and does not, consequently, retard the rotary movement of the ,same. When leaving the active end 0 of the magnet c and the extension-piece c, the heated part of the armature a reassumes its former temperature; but instead of letting the heated part cool down by itself I prefer to provide ;means for accelerating the cooling action. so as to make the respective parts quicker sus- -ceptible to the next attraction of the magnet.

;In the form of construction shown I make use of a metallic roll or roller g, which is con- .stantly in contact with the ring a and affords at the same time a means for conducting away the thermo-electric currents generated in said ring. There is, besides the roll or roller g, .which is located at the hottest part of the ring a, another roll or 1Oll9I,/L, located nearly opposite to the former and connected with the same by a wiref. The current passing through this wire may be employed in any desired manner. The armature or ring a may be acted on by more than one magnet, and instead of a rotary armature an oscillating or, may be, sliding armature may be employed. In every case the armature should, what is preferable, consist of a material that can be more easily demagnetized than the magnet 0, because the temperature of the latter must be higher than that of the armature. The armature, on the other hand, need not be completely demagnetized. The magnetizability of the heated part of the same need only be diminished without materially affecting the ,efficiency of the motor.

Having now described my invention, what I desire to secure by Letters Patent of the United States is- 1. In an electrical heat-motor having a magnetizable armature, means for producing a magnetic field, and means for partially demagnetizingsaid armature so as to cause it to move in said magnetic field, the combination, with said armature and means, of an electrical heating device adapted to produce the heat 7 necessary for partially demagnetizing the said armature, as set forth.

2. In an electrical heat-motor having a magnetizable armature, a field-producing magnet, and means for partially demagnetizing said armature so as to cause it to move in said field, the combination with said armature, magnet, and means, of a coil adapted to excite as well as to heat the active end of said magnet, said end being in close proximity to the said armature, as set forth.

3. In an electrical heat-motor having a magnetizable armature, a field-producing magnet, and means for partially demagnetizing said armature so as to cause it to move in said field, the combination with said armature, magnet, its coil, and the means stated, of another coil arranged upon said magnet in front of said first coil, and adapted to heat the active end of the said magnet, said end being in close proximity to the said armature, as set forth.

4:. In an electrical heat-motor having a magnetizable armature, a field-producing magnet, and means for partially demagnetizing said armature soas to cause it to move in said field, the combination with said armature, magnet, and means, of a coil adapted to excite as well as to heat the active end of said magnet, said end being in close proximity to the said armature, and the latter consisting of a material adapted to be more easily demagnetized than the material which the said magnet consists of, as set forth.

5. In an electrical heat-motor having a magnetizable armature, a field-producing magnet, and means for partially demagnetizing said armature so as to cause it to move in said field,

the combination, with said armature, magnet, and means, of a coil adapted to excite as well as to heat the active end of said magnet, and an extension-piece attached to said end and consisting of a heat-conducting, but non-magnetizable material, the said end and said extension-piece being in close proximity to the said armature, as set forth. I

6. In an electrical heat-motor having a magnetizable armature, means for producing a magnetic field, and means for partially demagnetizing said armature, so as to cause it to move in said magnetic field, the combination, with said armature and means, of an electrical heating device adapted to produce the heat necessary for partially demagnetizing the said armature, and means for cooling the heated parts of the latter, as set forth.

7 In an electrical heat-motor having a magnetizable armature, means for producing a magnetic field, and means for partially demagnetizing said armature, so as to cause it to move in said magnetic field, the combination,

with said armature and means, of an electrical heating device adapted to produce the heat necessary for partially demagnetizing the said armature, a metallic body so arranged as to be adapted to conduct away the heat of the heated part of the latter, another metallic body arranged about diagonally opposite to the former, and a wire connecting said bodies, as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

- HUGO BREMER.

Witnesses:

ARTHUR T. EBSWORTH, WALTER J. SKERTEN. 

